Mercurial > eldonilo > lightstring

annotate lightstring.js @ 78:4d0fc1c9ec88

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Call iq-callbacks success/error with the right context.
author Sonny Piers <sonny.piers@gmail.com>
date Tue, 07 Feb 2012 18:36:14 +0100
parents 7854e036a572
children 2290321f5c8b
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1
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1 'use strict';
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2
2
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3 /**
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4 Copyright (c) 2011, Sonny Piers <sonny at fastmail dot net>
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5
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6 Permission to use, copy, modify, and/or distribute this software for any
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7 purpose with or without fee is hereby granted, provided that the above
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8 copyright notice and this permission notice appear in all copies.
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9
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10 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19
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20 var Lightstring = {
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21 /**
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22 * @namespace Holds XMPP namespaces.
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23 * @description http://xmpp.org/xmpp-protocols/protocol-namespaces
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24 */
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25 ns: {
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26 streams: 'http://etherx.jabber.org/streams',
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27 jabber_client: 'jabber:client',
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28 xmpp_stanzas: 'urn:ietf:params:xml:ns:xmpp-stanzas'
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29 },
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30 /**
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31 * @namespace Holds XMPP stanza builders.
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32 */
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33 stanzas: {
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34 stream: {
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35 open: function(aService) {
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36 //WORKAROUND: no ending "/" - node-xmpp-bosh bug
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37 return "<stream:stream to='" + aService + "'" +
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38 " xmlns='" + Lightstring.ns['jabber_client'] + "'" +
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39 " xmlns:stream='" + Lightstring.ns['streams'] + "'" +
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40 " version='1.0'/>";
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41 },
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42 close: function() {
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43 return "</stream:stream>";
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44 }
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45 },
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46 errors: {
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47 iq: function(from, id, type, error) {
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48 return "<iq to='" + from + "'" +
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49 " id='" + id + "'" +
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50 " type='error'>" +
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51 "<error type='" + type + "'>" +
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52 "<" + error + " xmlns='" + Lightstring.ns['xmpp_stanzas'] + "'/>" + //TODO: allow text content.
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53 //TODO: allow text and payload.
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54 "</error>" +
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55 "</iq>";
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56 }
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57 }
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58 },
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59 /**
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60 * @namespace Holds Lightstring plugins
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61 */
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62 plugins: {},
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63 /**
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64 * @private
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65 */
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66 parser: new DOMParser(),
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67 /**
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68 * @private
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69 */
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70 serializer: new XMLSerializer(),
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71 /**
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72 * @function Transforms a XML string to a DOM object.
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73 * @param {String} aString XML string.
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74 * @return {Object} Domified XML.
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75 */
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76 XML2DOM: function(aString) {
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77 var DOM = null;
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78 try {
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79 DOM = this.parser.parseFromString(aString, 'text/xml').documentElement;
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80 }
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81 catch (e) {
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82 //TODO: error
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83 }
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84 finally {
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85 return DOM;
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86 };
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87 },
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88 /**
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89 * @function Transforms a DOM object to a XML string.
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90 * @param {Object} aString DOM object.
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91 * @return {String} Stringified DOM.
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92 */
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93 DOM2XML: function(aElement) {
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94 var XML = null;
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95 try {
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96 XML = this.serializer.serializeToString(aElement);
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97 }
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98 catch (e) {
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99 //TODO: error
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100 }
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101 finally {
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102 return XML;
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103 };
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104 },
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105 /**
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106 * @function Get an unique identifier.
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107 * @param {String} [aString] Prefix to put before the identifier.
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108 * @return {String} Identifier.
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109 */
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110 newId: (function() {
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111 var id = 1024;
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112 return function(prefix) {
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113 if (typeof prefix === 'string')
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114 return prefix + id++;
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115 return '' + id++;
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116 };
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117 })()
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118 };
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119
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120 /**
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121 * @constructor Creates a new Lightstring connection
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122 * @param {String} [aService] The Websocket service URL.
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123 * @memberOf Lightstring
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124 */
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125 Lightstring.Connection = function(aService) {
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126 if (aService)
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127 this.service = aService;
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128 /**
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129 * @namespace Holds connection events handlers
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130 */
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131 this.handlers = {};
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132 /**
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133 * @namespace Holds connection iq callbacks
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134 */
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135 this.callbacks = {};
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136 };
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137 Lightstring.Connection.prototype = {
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138 /**
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139 * @function Create and open a websocket then go though the XMPP authentification process.
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140 * @param {String} [aJid] The JID (Jabber id) to use.
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141 * @param {String} [aPassword] The associated password.
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142 */
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143 connect: function(aJid, aPassword) {
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144 this.emit('connecting');
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145 this.jid = new Lightstring.JID(aJid);
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146 if (aPassword)
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147 this.password = aPassword;
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148
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149 if (!this.jid.bare)
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150 return; //TODO: error
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151 if (!this.service)
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152 return; //TODO: error
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153
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154 if (typeof(WebSocket) === "function") {
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155 this.socket = new WebSocket(this.service, 'xmpp');
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156 }
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157 else if (typeof(MozWebSocket) === "function") {
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158 this.socket = new MozWebSocket(this.service, 'xmpp');
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159 }
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160 else {
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161 return; //TODO: error
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162 }
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163
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164 var Conn = this;
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165 this.socket.addEventListener('open', function() {
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166 if (this.protocol !== 'xmpp')
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167 return; //TODO: error
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168
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169 var stream = Lightstring.stanzas.stream.open(Conn.jid.domain);
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170 //FIXME: Use Lightstring.Connection.send (problem with parsing steam);
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171 Conn.socket.send(stream);
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172 var stanza = {
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173 XML: stream
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174 };
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175 Conn.emit('output', stanza);
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176 });
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177 this.socket.addEventListener('error', function(e) {
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178 Conn.emit('disconnecting', e.data);
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179 //TODO: error
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180 });
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181 this.socket.addEventListener('close', function(e) {
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182 Conn.emit('disconnected', e.data);
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183 });
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184 this.socket.addEventListener('message', function(e) {
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185 var stanza = new Lightstring.Stanza(e.data);
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186
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187 //FIXME: node-xmpp-bosh sends a self-closing stream:stream tag; it is wrong!
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188 Conn.emit('input', stanza);
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189
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190 if (!stanza.DOM)
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191 return;
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192
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193 var name = stanza.DOM.localName;
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194
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195 //Authentication
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196 //FIXME SASL mechanisms and XMPP features can be both in a stream:features
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197 if (name === 'features') {
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198 //SASL mechanisms
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199 if (stanza.DOM.firstChild.localName === 'mechanisms') {
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200 stanza.mechanisms = [];
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201 var nodes = stanza.DOM.querySelectorAll('mechanism');
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202 for (var i = 0; i < nodes.length; i++)
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203 stanza.mechanisms.push(nodes[i].textContent);
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204 Conn.emit('mechanisms', stanza);
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205 }
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206 //XMPP features
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207 else {
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208 //TODO: stanza.features
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209 Conn.emit('features', stanza);
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210 }
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211 }
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212 else if (name === 'challenge') {
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213 Conn.emit('challenge', stanza);
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214 }
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215 else if (name === 'failure') {
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216 Conn.emit('failure', stanza);
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217 }
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218 else if (name === 'success') {
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219 Conn.emit('success', stanza);
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220 }
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221
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222 //Iq callbacks
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223 else if (name === 'iq') {
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224 var payload = stanza.DOM.firstChild;
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225 if (payload)
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226 Conn.emit('iq/' + payload.namespaceURI + ':' + payload.localName, stanza);
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227
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228 var id = stanza.DOM.getAttributeNS(null, 'id');
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229 if (!(id && id in Conn.callbacks))
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230 return;
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231
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232 var type = stanza.DOM.getAttributeNS(null, 'type');
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233 if (type !== 'result' && type !== 'error')
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234 return; //TODO: warning
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235
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236 var callback = Conn.callbacks[id];
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237 if (type === 'result' && callback.success)
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238 callback.success.call(Conn, stanza);
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239 else if (type === 'error' && callback.error)
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240 callback.error.call(Conn, stanza);
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241
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242 delete Conn.callbacks[id];
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243 }
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244
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245 else if (name === 'presence' || name === 'message') {
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246 Conn.emit(name, stanza);
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247 }
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248 });
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249 },
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250 /**
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251 * @function Send a message.
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252 * @param {String|Object} aStanza The message to send.
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253 * @param {Function} [aCallback] Executed on answer. (stanza must be iq)
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254 */
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255 send: function(aStanza, aSuccess, aError) {
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256 if (!(aStanza instanceof Lightstring.Stanza))
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257 var stanza = new Lightstring.Stanza(aStanza);
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258 else
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259 var stanza = aStanza;
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260
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261 if (!stanza)
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262 return;
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263
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264 if (stanza.DOM.tagName === 'iq') {
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265 var type = stanza.DOM.getAttributeNS(null, 'type');
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266 if (type !== 'get' || type !== 'set')
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267 ; //TODO: error
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268
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269 var callback = {success: aSuccess, error: aError};
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270
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271 var id = stanza.DOM.getAttributeNS(null, 'id');
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272 if (!id)
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273 ; //TODO: warning
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274 else
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275 this.callbacks[id] = callback;
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276
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277 this.callbacks[id] = callback;
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278
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279 }
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280 else if (aSuccess || aError)
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281 ; //TODO: warning (no callback without iq)
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282
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283
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284 //FIXME this.socket.send(stanza.XML); (need some work on Lightstring.Stanza)
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285 var fixme = Lightstring.DOM2XML(stanza.DOM);
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286 stanza.XML = fixme;
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287 this.socket.send(fixme);
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288 this.emit('output', stanza);
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289 },
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290 /**
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291 * @function Closes the XMPP stream and the socket.
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292 */
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293 disconnect: function() {
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294 this.emit('disconnecting');
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295 var stream = Lightstring.stanzas.stream.close();
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296 this.send(stream);
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297 this.emit('XMLOutput', stream);
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298 this.socket.close();
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299 },
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300 load: function() {
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301 for (var i = 0; i < arguments.length; i++) {
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302 var name = arguments[i];
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303 if (!(name in Lightstring.plugins))
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304 continue; //TODO: error
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305
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306 var plugin = Lightstring.plugins[name];
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307
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308 //Namespaces
44
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309 for (var ns in plugin.namespaces)
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310 Lightstring.ns[ns] = plugin.namespaces[ns];
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311
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312 //Stanzas
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313 Lightstring.stanzas[name] = {};
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314 for (var stanza in plugin.stanzas)
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315 Lightstring.stanzas[name][stanza] = plugin.stanzas[stanza];
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316
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317 //Handlers
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318 for (var handler in plugin.handlers)
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319 this.on(handler, plugin.handlers[handler]);
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320
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321 //Methods
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322 this[name] = {};
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323 for (var method in plugin.methods)
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324 this[name][method] = plugin.methods[method].bind(this);
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325
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326 if (plugin.init)
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327 plugin.init.apply(this);
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328 }
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329 },
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330 /**
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331 * @function Emits an event.
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332 * @param {String} aName The event name.
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333 * @param {Function|Array|Object} [aData] Data about the event.
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334 */
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335 emit: function(aName, aData) {
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336 var handlers = this.handlers[aName];
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337 if (!handlers)
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338 return;
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339
77
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340 //No data events
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341 if(!aData) {
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342 for (var i = 0; i < handlers.length; i++)
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343 handlers[i].call(this, aData);
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344
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345 return;
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346 }
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347
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348 //Non-iq events
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349 if (aData && aData.DOM && aData.DOM.localName !== 'iq') {
62
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350 for (var i = 0; i < handlers.length; i++)
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351 handlers[i].call(this, aData);
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352
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353 return;
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354 }
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355
77
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356 //Iq events
62
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357 var ret;
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358 for (var i = 0; i < handlers.length; i++) {
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359 ret = handlers[i].call(this, aData);
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360 if (typeof ret !== 'boolean')
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361 return; //TODO: error
62
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362
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363 if (ret)
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364 return;
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365 }
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366
71
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diff changeset
367 if (aData && aData.DOM) {
72
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diff changeset
368 var type = aData.DOM.getAttributeNS(null, 'type');
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diff changeset
369 if (type !== 'get' && type !== 'set')
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370 return;
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371
71
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372 var from = aData.DOM.getAttributeNS(null, 'from');
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373 var id = aData.DOM.getAttributeNS(null, 'id');
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374 this.send(Lightstring.stanzas.errors.iq(from, id, 'cancel', 'service-unavailable'));
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375 }
17
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376 },
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377 /**
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378 * @function Register an event handler.
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379 * @param {String} aName The event name.
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380 * @param {Function} aCallback The callback to call when the event is emitted.
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381 */
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382 on: function(aName, callback) {
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383 if (!this.handlers[aName])
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384 this.handlers[aName] = [];
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385 this.handlers[aName].push(callback);
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386 }
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387 };